Alright, let's work through 4991 times 5491 step by step
4991 × 5491 = 5491 × (4991)
+ 5491 × 1 that is equal 5491
+ 5491 × 90 what gives us 494190
+ 5491 × 900 which equals 4941900
+ 5491 × 4000 which equals 21964000

= 27405581
